Scalable community discovery from multi-faceted graphs

A multi-faceted graph defines several facets on a set of nodes. Each facet is a set of edges that represent the relationships between the nodes in a specific context. Mining multi-faceted graphs have several applications, including finding fraudster rings that launch advertising traffic fraud attacks, tracking IP addresses of botnets over time, analyzing interactions on social networks and co-authorship of scientific papers. We propose NeSim, a distributed efficient clustering algorithm that does soft clustering on individual facets. We also propose optimizations to further improve the scalability, the efficiency and the clusters quality. We employ generalpurpose graph-clustering algorithms in a novel way to discover communities across facets. Due to the qualities of NeSim, we employ it as a backbone in the distributed MuFace algorithm, which discovers multi-faceted communities. We evaluate the proposed algorithms on several real and synthetic datasets, where NeSim is shown to be superior to MCL, JP and AP, the well-established clustering algorithms. We also report the success stories of MuFace in finding advertisement click rings.